Add CF worker

package.json

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+{
+  "name": "knxbin",
+  "version": "0.0.0",
+  "devDependencies": {
+    "wrangler": "2.1.11"
+  },
+  "private": true,
+  "scripts": {
+    "start": "wrangler dev",
+    "deploy": "wrangler publish"
+  },
+  "dependencies": {
+    "nanoid": "^4.0.0"
+  }
+}

src/index.js

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+import { nanoid } from 'nanoid'
+
+export default {
+	async fetch(request, env) {
+		const url = new URL(request.url);
+		const key = url.pathname.slice(1);
+
+		switch (request.method) {
+			case 'OPTIONS':
+				return new Response(null, { headers: {
+					'Access-Control-Allow-Origin': '*',
+					'Access-Control-Allow-Methods': '*',
+					'Access-Control-Allow-Credentials': 'true'
+				}})
+			case 'PUT':
+				if(key !== 'documents')
+					return new Response('Unknown operation', { status: 404 });
+
+				const randomKey = nanoid()
+
+				// get string from request body
+				const body = await request.text()
+
+				// if string length is over 10000000, return error
+				if(body.length > 10000000)
+					return new Response('Document too large', { status: 413, headers: { 'Access-Control-Allow-Origin': '*' } })
+
+				await env.PASTES_BUCKET.put(randomKey, body);
+				return new Response('{"key":"' + randomKey + '"}', { status: 200, headers: { 'Access-Control-Allow-Origin': '*' } });
+			case 'GET':
+				if(key.split("/")[0] === 'raw') {
+					const rawKey = url.pathname.slice(5)
+
+					const object = await env.PASTES_BUCKET.get(rawKey);
+
+					if (object === null) {
+						return new Response('{"data":"Object Not Found", "key":' + rawKey + '}', { status: 404, headers: { 'Access-Control-Allow-Origin': '*' } });
+					}
+
+					const headers = new Headers();
+					object.writeHttpMetadata(headers);
+					headers.set('etag', object.httpEtag);
+					headers.set('Access-Control-Allow-Origin', '*')
+
+					const data = await object.text();
+
+					return new Response(data, {
+						headers,
+					});
+				}
+
+				const object = await env.PASTES_BUCKET.get(key);
+
+				if (object === null) {
+					return new Response('{"data":"Object Not Found", "key":' + key + '}', { status: 404, headers: { 'Access-Control-Allow-Origin': '*' } });
+				}
+
+				const headers = new Headers();
+				object.writeHttpMetadata(headers);
+				headers.set('etag', object.httpEtag);
+				headers.set('Access-Control-Allow-Origin', '*')
+
+				const data = await object.text();
+
+				return new Response('{"data":' + JSON.stringify(data) + ',"key":"' + key + '"}', {
+					headers,
+				});
+			default:
+				return new Response('Method Not Allowed', {
+					status: 405,
+					headers: {
+						Allow: 'PUT, GET, OPTIONS',
+						'Access-Control-Allow-Origin': '*'
+					},
+				});
+		}
+	},
+};

wrangler.toml

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+name = "knxbin"
+main = "src/index.js"
+compatibility_date = "2022-11-01"
+
+account_id = "025f25a08c29a51063e7a310a947a927"
+
+[[r2_buckets]]
+binding = 'PASTES_BUCKET'
+bucket_name = 'pastes-bucket'
+
+routes = [	{ pattern = "api.knx.cool", custom_domain = true, zone_name = "knx.cool" }
+]